// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/gl/scoped_make_current.h"

#include "base/logging.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_surface.h"

namespace ui {

ScopedMakeCurrent::ScopedMakeCurrent(gfx::GLContext* context,
    gfx::GLSurface* surface)
    : previous_context_(gfx::GLContext::GetCurrent())
    , previous_surface_(gfx::GLSurface::GetCurrent())
    , context_(context)
    , surface_(surface)
    , succeeded_(false)
{
    DCHECK(context);
    DCHECK(surface);
    succeeded_ = context->MakeCurrent(surface);
}

ScopedMakeCurrent::~ScopedMakeCurrent()
{
    if (previous_context_.get()) {
        DCHECK(previous_surface_.get());
        previous_context_->MakeCurrent(previous_surface_.get());
    } else {
        context_->ReleaseCurrent(surface_.get());
    }
}

bool ScopedMakeCurrent::Succeeded() const
{
    return succeeded_;
}

} // namespace ui
